<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>flat 与 flatMap</title>
	</head>
	<body>
		<script>
			//flat 平
			//将多维数组转化为低维数组
			// const arr = [1,2,3,4,[5,6]];
			// const arr = [1,2,3,4,[5,6,[7,8,9]]];
			//参数为深度 是一个数字
			// console.log(arr.flat(2));

			//flatMap
			const arr = [1, 2, 3, 4];
			const result = arr.flatMap((item) => [item * 10]);
			console.log(result);
		</script>
	</body>
</html>
